Rollable optical fibre ribbon with intermittent bonding

Abstract

The present disclosure provides a rollable optical fibre ribbon ( 100 ) with intermittent bonding. The rollable optical fibre ribbon ( 100 ) includes a plurality of optical fibres. The plurality of optical fibres ( 102 ) are placed parallel to each other, wherein the plurality of optical fibres ( 102 ) adjacent to each other are bonded intermittently along a length by a plurality of bonded portions ( 104 ). The plurality of bonded portions ( 104 ) occupies 3 to 20% of an area of the rollable optical fibre ribbon of length 1 meter. An area of the plurality of bonded portions ( 104 ) is defined as an area projected by the plurality of bonded ( 104 ) portions on a plane passing through centres of the plurality of optical fibres ( 102 ) of the rollable optical fibre ribbon ( 100 ) and extending longitudinally.

We claim: 
     
       1. A rollable optical fibre ribbon with intermittent bonding, the rollable optical fibre ribbon comprising:
 a plurality of optical fibres, wherein the plurality of optical fibres are placed parallel to each other, wherein the plurality of optical fibres adjacent to each other are bonded intermittently along a length by a plurality of bonded portions, wherein the plurality of bonded portions occupies 3 to 20% of an area of the rollable optical fibre ribbon of length of 1 meter; and 
 wherein an area of the plurality of bonded portions is defined as an area projected by the plurality of bonded portions on a plane passing through centres of the plurality of optical fibres of the rollable optical fibre ribbon and extending longitudinally, wherein the area of the rollable optical fibre ribbon is defined as area projected by the optical fibre ribbon on a plane passing through centres of the plurality of optical fibres of the rollable optical fibre ribbon and extending longitudinally. 
 
     
     
       2. The rollable optical fibre ribbon as claimed in  claim 1 , wherein each of the plurality of bonded portions is followed by an unbonded portion. 
     
     
       3. The rollable optical fibre ribbon as claimed in  claim 1 , wherein each of the plurality of bonded portions has one of convex shape, concave shape, and flat shape. 
     
     
       4. The rollable optical fibre ribbon as claimed in  claim 1 , wherein the rollable optical fibre ribbon has a height of at most 270 microns. 
     
     
       5. The rollable optical fibre ribbon as claimed in  claim 1 , wherein each of the plurality of bonded portions have a bond width of less than a diameter of each of the plurality of optical fibres in the rollable optical fibre ribbon. 
     
     
       6. The rollable optical fibre ribbon as claimed in  claim 1 , wherein each of the plurality of optical fibers has a primary coating with a thickness of at most 130 micron and in-situ modulus of less than 0.6 mega pascals. 
     
     
       7. The rollable optical fibre ribbon as claimed in  claim 1 , wherein each of the plurality of optical fibers has an attenuation of at most 0.3 decibel per kilometer at a wavelength of about 1550 nanometer. 
     
     
       8. The rollable optical fibre ribbon as claimed in  claim 1 , wherein the plurality of optical fibres is coated with at least one of water-swellable material, fire-resistant material, and an identification material. 
     
     
       9. The rollable optical fibre ribbon as claimed in  claim 1 , wherein the rollable optical fibre ribbon has a pitch substantially larger than a diameter of each of the plurality of optical fibres. 
     
     
       10. The rollable optical fibre ribbon as claimed in  claim 1 , wherein the rollable optical fibre ribbon has a pitch substantially the same as a diameter of each of the plurality of optical fibres. 
     
     
       11. The rollable optical fibre ribbon as claimed in  claim 1 , wherein the plurality of bonded portions occupy an area of 9 to 20% of the rollable optical fibre ribbon, wherein the plurality of bonded portions comprises connecting portions with width of at least 125 microns. 
     
     
       12. The rollable optical fibre ribbon as claimed in  claim 1 , wherein the plurality of bonded portions occupy an area of 3 to 9% of the rollable optical fibre ribbon  7  wherein the plurality of bonded portions comprises connecting portions with width of at most 125 microns.